Breaking Change: Added strongly-typed indexing support for IList<T>. Because IList<T> takes precedence over IList, array and list elements retrieved by index are now correctly type-restricted. Use the new property ScriptEngine.DisableListIndexTypeRestriction to restore the previous behavior, or ScriptEngine.DisableTypeRestriction to control type restriction globally.

V8RuntimeConstraints limits are now specified in MiB. For compatibility with hosts that predate an inadvertent breaking change in Version 5.4.1, values greater than 1048576 (1 TiB) are still interpreted as bytes.